One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9,11,6)(4,7)(5,8)(10,15,16,13)(12,14)(17,18)(19,23)(20,22)(21,25)(24,28)(26,30)(27,29)(31,32)(1,3)(2,6)(4,10)(5,11)(7,13)(8,9)(12,16)(14,15)(18,22)(20,28)(23,29)(24,25)(27,32)(30,31) involution — undirected(1,4,5,12)(2,7,8,14)(3,10,11,16)(6,13,9,15)(17,19,21,26)(18,23,25,30)(20,27,28,32)(22,29,24,31)(19,26)(23,30)(27,32)(29,31) involution — undirected(2,8)(6,9)(7,14)(13,15) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.